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Finding the Fourth Proportional to 479,443.16, 719,485.80 and 198,960.68

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Solution

The fourth proportional to 479,443.16, 719,485.80 and 198,960.68 is: 298,574.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,443.16 : 719,485.80 = 198,960.68 : x
  2. Step 2: Convert to fraction form
    479,443.16/719,485.80 = 198,960.68/x
  3. Step 3: Cross multiply
    479,443.16x = 719,485.80 × 198,960.68
  4. Step 4: Simplify right side
    479,443.16x = 143,149,384,018.34
  5. Step 5: Solve for x
    x = 143,149,384,018.34/479,443.16
  6. Step 6: Final answer
    x = 298,574.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.